EP 0474418 A3 19920701 - POLYESTER COPOLYMER FIBER HAVING ENHANCED STRENGTH AND DYEABILITY PROPERTIES

Title (en)

POLYESTER COPOLYMER FIBER HAVING ENHANCED STRENGTH AND DYEABILITY PROPERTIES

Publication

EP 0474418 A3 19920701 (EN)

Application

EP 91307827 A 19910827

Priority

US 57545290 A 19900828

Abstract (en)

[origin: EP0474418A2] The invention is a method of producing a polyester filament which has a superior combination of tensile, dyeability and shrinkage properties. The method comprises forming a polyester copolymer from a mixture consisting essentially of terephthalic acid (TA) or dimethyl terephthalate (DMT), ethylene glycol, adipic acid, and pentaerythritol wherein the adipic acid is added in an amount of between 1.3 and 3.2 weight percent of the terephthalic acid and pentaerythritol is added in the amount from 175 to 700 ppm by weight of terephthalic acid; forming the filament from the copolymer, drawing the copolymer filament, and heat-setting the drawn filament. The invention also comprises the enhanced fiber formed by the process having an atmospheric dyeability greater than that of an unenhanced PET produced under identical conditions except for the addition of the adipic acid and pentaerythritol, a modulus of greater than 3.0 g/denier, a tenacity from about 5 to 7 g/denier and a hot air shrinkage of less than 10%.

IPC 1-7

C08G 63/20; D01F 6/84

IPC 8 full level

C08G 63/20 (2006.01); D01F 6/84 (2006.01)

CPC (source: EP US)

C08G 63/20 (2013.01 - EP US); D01F 6/84 (2013.01 - EP US)

Citation (search report)

[X] DE 2432981 A1 19750327 - KURARAY CO
[Y] FR 2241574 A1 19750321 - BASF AG [DE]
[YD] US 4113704 A 19780912 - MACLEAN DONALD L, et al
[A] US 3576773 A 19710427 - VAGINAY YVES
[Y] POLYMER SCIENCE USSR, vol. 3, no. 4, 1962, pages 602-607; B.V. PETUKHOV et al.: "Isomorphous substitution in polyethyleneterephthalate"
[A] WPI / DERWENT, accession no. 73-31777U [22], Derwent Publications Ltd, London, GB; & JP-A-48 017 214 (TEIJIN LTD)

Designated contracting state (EPC)

AT BE CH DE FR GB IT LI LU NL

DOCDB simple family (publication)

EP 0474418 A2 19920311; EP 0474418 A3 19920701; CA 2049402 A1 19920301; MX 9100820 A 19920401; US 5135697 A 19920804

DOCDB simple family (application)

EP 91307827 A 19910827; CA 2049402 A 19910816; MX 9100820 A 19910826; US 57545290 A 19900828